粗略的想法是，我们建模一个触发审阅活动的事件处理程序。

The rough idea is that we model an event handler that triggers one review.

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因此，不能够保证异步事件处理程序的执行顺序与触发更新的顺序一样。

Therefore, there is no guarantee that asynchronous event handlers will execute in the same order as the triggering updates.

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设想一下，您将能够引用在屏幕上呈现的任何HTML元素、更改其属性、设置由事件触发的处理程序并修改其外观，而所有这些都能即时实现。而这一切如今已成为现实。

Imagine if you could reference any HTML element rendered on the screen, change its properties, set handlers triggered by events, and modify its appearance — all instantaneously.

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